[11/51] [partial] hbase-site git commit: Published site at 7dabcf23e8dd53f563981e1e03f82336fc0a44da.

[misty]

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3e48e84d/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/CacheConfig.html
----------------------------------------------------------------------
diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/CacheConfig.html 
b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/CacheConfig.html
index ec27cfe..6d8219b 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/CacheConfig.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/CacheConfig.html
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 <span class="sourceLineNo">084</span>  /**<a name="line.84"></a>
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&lt;code&gt;file:/tmp/bucketcache.data &lt;/code&gt;, then we will write the 
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&lt;code&gt;/tmp/bucketcache.data&lt;/code&gt; but the metadata on where the 
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BUCKET_CACHE_WRITER_QUEUE_KEY = <a name="line.106"></a>
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"hbase.bucketcache.writer.queuelength";<a name="line.107"></a>
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BUCKET_CACHE_BUCKETS_KEY = "hbase.bucketcache.bucket.sizes";<a 
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+<span class="sourceLineNo">121</span> /**<a name="line.121"></a>
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memcached("org.apache.hadoop.hbase.io.hfile.MemcachedBlockCache");<a 
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read (default is on if there is a<a name="line.177"></a>
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+<span class="sourceLineNo">179</span>   * If off we will STILL cache meta 
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conf.getBoolean(CACHE_DATA_BLOCKS_COMPRESSED_KEY, 
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conf.getBoolean(PREFETCH_BLOCKS_ON_OPEN_KEY,<a name="line.229"></a>
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conf.getBoolean(CACHE_BLOOM_BLOCKS_ON_WRITE_KEY, 
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conf.getBoolean(EVICT_BLOCKS_ON_CLOSE_KEY, DEFAULT_EVICT_ON_CLOSE),<a 
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conf.getBoolean(CACHE_DATA_BLOCKS_COMPRESSED_KEY, 
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conf.getBoolean(PREFETCH_BLOCKS_ON_OPEN_KEY, DEFAULT_PREFETCH_ON_OPEN),<a 
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conf.getBoolean(HColumnDescriptor.CACHE_DATA_IN_L1,<a name="line.253"></a>
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conf.getBoolean(DROP_BEHIND_CACHE_COMPACTION_KEY,DROP_BEHIND_CACHE_COMPACTION_DEFAULT)<a
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final boolean inMemory,<a name="line.276"></a>
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final boolean cacheIndexesOnWrite,<a name="line.277"></a>
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blocks up in the L1 tier (The meta blocks are likely being<a 
name="line.207"></a>
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the specified configuration object and<a name="line.215"></a>
+<span class="sourceLineNo">216</span>   * family descriptor.<a 
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configuration<a name="line.218"></a>
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this(CacheConfig.instantiateBlockCache(conf),<a name="line.221"></a>
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enable them regardless of per-schema settings<a name="line.224"></a>
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conf.getBoolean(CACHE_BLOCKS_ON_WRITE_KEY,<a name="line.226"></a>
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conf.getBoolean(CACHE_INDEX_BLOCKS_ON_WRITE_KEY,<a name="line.228"></a>
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DEFAULT_CACHE_INDEXES_ON_WRITE) || family.isCacheIndexesOnWrite(),<a 
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conf.getBoolean(CACHE_BLOOM_BLOCKS_ON_WRITE_KEY,<a name="line.230"></a>
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DEFAULT_CACHE_BLOOMS_ON_WRITE) || family.isCacheBloomsOnWrite(),<a 
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conf.getBoolean(EVICT_BLOCKS_ON_CLOSE_KEY,<a name="line.232"></a>
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family.isEvictBlocksOnClose(),<a name="line.233"></a>
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conf.getBoolean(CACHE_DATA_BLOCKS_COMPRESSED_KEY, 
DEFAULT_CACHE_DATA_COMPRESSED),<a name="line.234"></a>
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conf.getBoolean(PREFETCH_BLOCKS_ON_OPEN_KEY,<a name="line.235"></a>
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conf.getBoolean(HColumnDescriptor.CACHE_DATA_IN_L1,<a name="line.237"></a>
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HColumnDescriptor.DEFAULT_CACHE_DATA_IN_L1) || family.isCacheDataInL1(),<a 
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conf.getBoolean(DROP_BEHIND_CACHE_COMPACTION_KEY,DROP_BEHIND_CACHE_COMPACTION_DEFAULT)<a
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+<span class="sourceLineNo">241</span>  }<a name="line.241"></a>
+<span class="sourceLineNo">242</span><a name="line.242"></a>
+<span class="sourceLineNo">243</span>  /**<a name="line.243"></a>
+<span class="sourceLineNo">244</span>   * Create a cache configuration using 
the specified configuration object and<a name="line.244"></a>
+<span class="sourceLineNo">245</span>   * defaults for family level 
settings.<a name="line.245"></a>
+<span class="sourceLineNo">246</span>   * @param conf hbase configuration<a 
name="line.246"></a>
+<span class="sourceLineNo">247</span>   */<a name="line.247"></a>
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{<a name="line.248"></a>
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this(CacheConfig.instantiateBlockCache(conf),<a name="line.249"></a>
+<span class="sourceLineNo">250</span>        DEFAULT_CACHE_DATA_ON_READ,<a 
name="line.250"></a>
+<span class="sourceLineNo">251</span>        DEFAULT_IN_MEMORY, // This is a 
family-level setting so can't be set<a name="line.251"></a>
+<span class="sourceLineNo">252</span>                           // strictly 
from conf<a name="line.252"></a>
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conf.getBoolean(CACHE_BLOCKS_ON_WRITE_KEY, DEFAULT_CACHE_DATA_ON_WRITE),<a 
name="line.253"></a>
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conf.getBoolean(CACHE_INDEX_BLOCKS_ON_WRITE_KEY, 
DEFAULT_CACHE_INDEXES_ON_WRITE),<a name="line.254"></a>
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conf.getBoolean(CACHE_BLOOM_BLOCKS_ON_WRITE_KEY, 
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conf.getBoolean(EVICT_BLOCKS_ON_CLOSE_KEY, DEFAULT_EVICT_ON_CLOSE),<a 
name="line.256"></a>
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conf.getBoolean(CACHE_DATA_BLOCKS_COMPRESSED_KEY, 
DEFAULT_CACHE_DATA_COMPRESSED),<a name="line.257"></a>
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conf.getBoolean(PREFETCH_BLOCKS_ON_OPEN_KEY, DEFAULT_PREFETCH_ON_OPEN),<a 
name="line.258"></a>
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conf.getBoolean(HColumnDescriptor.CACHE_DATA_IN_L1,<a name="line.259"></a>
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HColumnDescriptor.DEFAULT_CACHE_DATA_IN_L1),<a name="line.260"></a>
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conf.getBoolean(DROP_BEHIND_CACHE_COMPACTION_KEY,DROP_BEHIND_CACHE_COMPACTION_DEFAULT)<a
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+<span class="sourceLineNo">262</span>     );<a name="line.262"></a>
+<span class="sourceLineNo">263</span>  }<a name="line.263"></a>
+<span class="sourceLineNo">264</span><a name="line.264"></a>
+<span class="sourceLineNo">265</span>  /**<a name="line.265"></a>
+<span class="sourceLineNo">266</span>   * Create a block cache configuration 
with the specified cache and<a name="line.266"></a>
+<span class="sourceLineNo">267</span>   * configuration parameters.<a 
name="line.267"></a>
+<span class="sourceLineNo">268</span>   * @param blockCache reference to block 
cache, null if completely disabled<a name="line.268"></a>
+<span class="sourceLineNo">269</span>   * @param cacheDataOnRead whether DATA 
blocks should be cached on read (we always cache INDEX<a name="line.269"></a>
+<span class="sourceLineNo">270</span>   * blocks and BLOOM blocks; this cannot 
be disabled).<a name="line.270"></a>
+<span class="sourceLineNo">271</span>   * @param inMemory whether blocks 
should be flagged as in-memory<a name="line.271"></a>
+<span class="sourceLineNo">272</span>   * @param cacheDataOnWrite whether data 
blocks should be cached on write<a name="line.272"></a>
+<span class="sourceLineNo">273</span>   * @param cacheIndexesOnWrite whether 
index blocks should be cached on write<a name="line.273"></a>
+<span class="sourceLineNo">274</span>   * @param cacheBloomsOnWrite whether 
blooms should be cached on write<a name="line.274"></a>
+<span class="sourceLineNo">275</span>   * @param evictOnClose whether blocks 
should be evicted when HFile is closed<a name="line.275"></a>
+<span class="sourceLineNo">276</span>   * @param cacheDataCompressed whether 
to store blocks as compressed in the cache<a name="line.276"></a>
+<span class="sourceLineNo">277</span>   * @param prefetchOnOpen whether to 
prefetch blocks upon open<a name="line.277"></a>
+<span class="sourceLineNo">278</span>   * @param cacheDataInL1 If more than 
one cache tier deployed, if true, cache this column families<a 
name="line.278"></a>
+<span class="sourceLineNo">279</span>   * data blocks up in the L1 tier.<a 
name="line.279"></a>
+<span class="sourceLineNo">280</span>   */<a name="line.280"></a>
+<span class="sourceLineNo">281</span>  CacheConfig(final BlockCache 
blockCache,<a name="line.281"></a>
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final boolean inMemory,<a name="line.282"></a>
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final boolean cacheIndexesOnWrite,<a name="line.283"></a>
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final boolean evictOnClose,<a name="line.284"></a>
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final boolean prefetchOnOpen,<a name="line.285"></a>
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boolean dropBehindCompaction) {<a name="line.286"></a>
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name="line.287"></a>
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cacheDataOnRead;<a name="line.288"></a>
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name="line.289"></a>
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cacheDataOnWrite;<a name="line.290"></a>
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cacheIndexesOnWrite;<a name="line.291"></a>
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cacheBloomsOnWrite;<a name="line.292"></a>
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name="line.293"></a>
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cacheDataCompressed;<a name="line.294"></a>
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prefetchOnOpen;<a name="line.295"></a>
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name="line.296"></a>
+<span class="sourceLineNo">297</span>    this.dropBehindCompaction = 
dropBehindCompaction;<a name="line.297"></a>
+<span class="sourceLineNo">298</span>    LOG.info(this);<a name="line.298"></a>
+<span class="sourceLineNo">299</span>  }<a name="line.299"></a>
+<span class="sourceLineNo">300</span><a name="line.300"></a>
+<span class="sourceLineNo">301</span>  /**<a name="line.301"></a>
+<span class="sourceLineNo">302</span>   * Constructs a cache configuration 
copied from the specified configuration.<a name="line.302"></a>
+<span class="sourceLineNo">303</span>   * @param cacheConf<a 
name="line.303"></a>
+<span class="sourceLineNo">304</span>   */<a name="line.304"></a>
+<span class="sourceLineNo">305</span>  public CacheConfig(CacheConfig 
cacheConf) {<a name="line.305"></a>
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cacheConf.cacheDataOnRead, cacheConf.inMemory,<a name="line.306"></a>
+<span class="sourceLineNo">307</span>        cacheConf.cacheDataOnWrite, 
cacheConf.cacheIndexesOnWrite,<a name="line.307"></a>
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cacheConf.evictOnClose,<a name="line.308"></a>
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cacheConf.prefetchOnOpen,<a name="line.309"></a>
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cacheConf.dropBehindCompaction);<a name="line.310"></a>
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+<span class="sourceLineNo">312</span><a name="line.312"></a>
+<span class="sourceLineNo">313</span>  /**<a name="line.313"></a>
+<span class="sourceLineNo">314</span>   * Checks whether the block cache is 
enabled.<a name="line.314"></a>
+<span class="sourceLineNo">315</span>   */<a name="line.315"></a>
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{<a name="line.316"></a>
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+<span class="sourceLineNo">319</span><a name="line.319"></a>
+<span class="sourceLineNo">320</span>  /**<a name="line.320"></a>
+<span class="sourceLineNo">321</span>   * Returns the block cache.<a 
name="line.321"></a>
+<span class="sourceLineNo">322</span>   * @return the block cache, or null if 
caching is completely disabled<a name="line.322"></a>
+<span class="sourceLineNo">323</span>   */<a name="line.323"></a>
+<span class="sourceLineNo">324</span>  public BlockCache getBlockCache() {<a 
name="line.324"></a>
+<span class="sourceLineNo">325</span>    return this.blockCache;<a 
name="line.325"></a>
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+<span class="sourceLineNo">327</span><a name="line.327"></a>
+<span class="sourceLineNo">328</span>  /**<a name="line.328"></a>
+<span class="sourceLineNo">329</span>   * Returns whether the DATA blocks of 
this HFile should be cached on read or not (we always<a name="line.329"></a>
+<span class="sourceLineNo">330</span>   * cache the meta blocks, the INDEX and 
BLOOM blocks).<a name="line.330"></a>
+<span class="sourceLineNo">331</span>   * @return true if blocks should be 
cached on read, false if not<a name="line.331"></a>
+<span class="sourceLineNo">332</span>   */<a name="line.332"></a>
+<span class="sourceLineNo">333</span>  public boolean shouldCacheDataOnRead() 
{<a name="line.333"></a>
+<span class="sourceLineNo">334</span>    return isBlockCacheEnabled() 
&amp;&amp; cacheDataOnRead;<a name="line.334"></a>
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+<span class="sourceLineNo">336</span><a name="line.336"></a>
+<span class="sourceLineNo">337</span>  public boolean 
shouldDropBehindCompaction() {<a name="line.337"></a>
+<span class="sourceLineNo">338</span>    return dropBehindCompaction;<a 
name="line.338"></a>
+<span class="sourceLineNo">339</span>  }<a name="line.339"></a>
+<span class="sourceLineNo">340</span><a name="line.340"></a>
+<span class="sourceLineNo">341</span>  /**<a name="line.341"></a>
+<span class="sourceLineNo">342</span>   * Should we cache a block of a 
particular category? We always cache<a name="line.342"></a>
+<span class="sourceLineNo">343</span>   * important blocks such as index 
blocks, as long as the block cache is<a name="line.343"></a>
+<span class="sourceLineNo">344</span>   * available.<a name="line.344"></a>
+<span class="sourceLineNo">345</span>   */<a name="line.345"></a>
+<span class="sourceLineNo">346</span>  public boolean 
shouldCacheBlockOnRead(BlockCategory category) {<a name="line.346"></a>
+<span class="sourceLineNo">347</span>    return isBlockCacheEnabled()<a 
name="line.347"></a>
+<span class="sourceLineNo">348</span>        &amp;&amp; (cacheDataOnRead ||<a 
name="line.348"></a>
+<span class="sourceLineNo">349</span>            category == 
BlockCategory.INDEX ||<a name="line.349"></a>
+<span class="sourceLineNo">350</span>            category == 
BlockCategory.BLOOM ||<a name="line.350"></a>
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+<span class="sourceLineNo">352</span>                (category != 
BlockCategory.META &amp;&amp;<a name="line.352"></a>
+<span class="sourceLineNo">353</span>                 category != 
BlockCategory.UNKNOWN)));<a name="line.353"></a>
+<span class="sourceLineNo">354</span>  }<a name="line.354"></a>
+<span class="sourceLineNo">355</span><a name="line.355"></a>
+<span class="sourceLineNo">356</span>  /**<a name="line.356"></a>
+<span class="sourceLineNo">357</span>   * @return true if blocks in this file 
should be flagged as in-memory<a name="line.357"></a>
+<span class="sourceLineNo">358</span>   */<a name="line.358"></a>
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